linux-kernel - [PATCH 4.19 128/139] staging: rtl8723bs: Fix incorrect sense of ether_addr

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Message-Id: <20181204103656.008256903@linuxfoundation.org>
Date:   Tue,  4 Dec 2018 11:50:09 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, youling257 <youling257@...il.com>,
        u.srikant.patnaik@...il.com,
        Larry Finger <Larry.Finger@...inger.net>
Subject: [PATCH 4.19 128/139] staging: rtl8723bs: Fix incorrect sense of ether_addr_equal

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Larry Finger <Larry.Finger@...inger.net>

commit c948c6915b620f075496846df8d4487ee0c56121 upstream.

In commit b37f9e1c3801 ("staging: rtl8723bs: Fix lines too long in
update_recvframe_attrib()."), the refactoring involved replacing
two memcmp() calls with ether_addr_equal() calls. What the author
missed is that memcmp() returns false when the two strings are equal,
whereas ether_addr_equal() returns true when the two addresses are
equal. One side effect of this error is that the strength of an
unassociated AP was much stronger than the same AP after association.
This bug is reported at bko#201611.

Fixes: b37f9e1c3801 ("staging: rtl8723bs: Fix lines too long in update_recvframe_attrib().")
Cc: Stable <stable@...r.kernel.org>
Cc: youling257 <youling257@...il.com>
Cc: u.srikant.patnaik@...il.com
Reported-and-tested-by: youling257 <youling257@...il.com>
Signed-off-by: Larry Finger <Larry.Finger@...inger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c
+++ b/drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c
@@ -109,12 +109,12 @@ static void update_recvframe_phyinfo(uni
 	rx_bssid = get_hdr_bssid(wlanhdr);
 	pkt_info.bssid_match = ((!IsFrameTypeCtrl(wlanhdr)) &&
 				!pattrib->icv_err && !pattrib->crc_err &&
-				!ether_addr_equal(rx_bssid, my_bssid));
+				ether_addr_equal(rx_bssid, my_bssid));
 
 	rx_ra = get_ra(wlanhdr);
 	my_hwaddr = myid(&padapter->eeprompriv);
 	pkt_info.to_self = pkt_info.bssid_match &&
-		!ether_addr_equal(rx_ra, my_hwaddr);
+		ether_addr_equal(rx_ra, my_hwaddr);
 
 
 	pkt_info.is_beacon = pkt_info.bssid_match &&